Electric switch.



No. 808,065. PATENTED DEC. 26, 1905. s. H. BECK.

ELECTRIC SWITCH.

APPLICATION FILED APR.22.1905.

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UNITED STATES SAMUEL H. BECK, OF NEW YORIQ, N. Y.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application filed April 22, 1906. Serial No. 256,831.

To all "whom it may concern:

Be it known thatI, SAMUEL H. Back, a citizen of the United States ofAmerica, and a resident of the borough of Brooklyn, city, county, andState of New York, have invented certain new and useful Improvements inElectric Switches, of which the following is a specification.

My invention relates generally to electric switches, and has moreparticular reference to switches controlled by fluid-pressure.

My invention is used in connection with a motor for keepinga constantpressure in a reservoir for beer or the like. As the beer or otherbeverage is drawn off from its tank the pressure therein decreases par tpasse. When this pressure falls to a certain point, the motor must bestarted up to again increase the pressure to a proper amount. When theproper pressure is reached,it is necessary to throw the motor off. Themeans for starting or stopping the motor are preferably automatic andcontrolled by fluid-pressure in the reservoir. The switch for making andbreaking must act instantaneously, so that no sparking is produced. Ihave endeavored to invent an automatic electric switch controlled by thepressure in the reservoir, which shall most advantageously embody thesedesired characteristics.

Other features of my invention will appear as the specificationproceeds.

In the accompanying sheet of drawings I have illustrated my invention ina preferred form, although it will of course be understood that changesin arrangement or structure of parts may be made without departing fromthe spirit of my invention.

In the various figures I have indicated like parts by like numerals ofreference.

In the drawings, Figure 1 is a cross-sectional view of my switch withthe blade shown Fig. 2 is a similar view, parts being omitted, showingthe blade in its break position. Fig. 3 is an end elevation showing themanner in which I attach the switch to the cylinder. Fig. 4 is adiagrammatic view showing the motor, compressor, reservoir, and electricand pneumatic connections.

I From the reservoir containing the beer or other beverage the pipe 1leads to the cylinder 2, across which is stretched at a suitable pointand secured in a proper manner the diaphragm 3, of flexible material.Working in the cylinder is the plunger 4, having acollar- 5, providedwith a threaded passage 6, with which the plunger engages. The head ofthe plunger rests against the diaphragm, thereby enabling the latter tomove the plunger when the pressure thereon exceeds a certain amount. Thespring 8, mounted in the cylinder, presses against the collar and holdsthe plunger against the diaphragm. Its tension may be varied by suitablemeans, such as the thumb-screw 9, engaging with the interior threadedportion of the cylinder, the spring being seated on the thumb-screw. Thepassage 11 is formed in a thumb-screw through which the plunger 6passes,so that it may be adjusted in regard to its pressure upon thediaphragm without disconnectingthe parts. Properly secured to theoutside of the cylinder is the base 12, consisting of a non-combustibleinsulating material. Secured to the base are the clips 13 and 14:,forming electrodes, and from which the wires 15 and 16 lead to themotor. On a bracket 17, secured to the outer surface of the cylinder, isa movable member or blade 18, pivoted on the bracket at 19 and adaptedto make and break with the electrodes. As before intimated, it isnecessary that the make and break of the blade with the clips take placeinstantaneously. I accomplish this by the following means: Mounted onthe pivot 19 is an actuating member in this instance in the form of twobell-cranks 20 connected by means of the two cross bars or pins 21 and22. A spring 23 is connected at one end to the movable member or bladeand atits other end to the actuating memberin this case to the pin 24 ata point beyond the pivotal center 19 of the blade. It will readily beunderstood that as the actuating member is moved it carries or throwsthe spring from one side of the pivotal center of the blade to theother, making or breaking contact instantaneously, as the case may be.The actuating member may be moved by any suitable means, but ispreferably controlled in its movement by the amount of fluidpressureacting on the diaphragm. In the present instance I move it by means ofthe pin 25, secured to the collar of the plunger and passing through theslot 26, formed in the cylinder and adapted to contact with thecrossbars of the actuating member, so as to rotate the latter in onedirection or the other, according as the plunger is ascending ordescending.

The motor is indicated by 27 and operates the compressor 28, connectedwith the reservoir 31 by the tube 29.

indicates the electric connections running from the switch and whichreceive their supply from the battery 32.

The switch operates as follows: The pressure having decreased to acertain point, the blade will be in contact with the clips, as shown inFig. 1, and the motor started. The action of the latter increases thepressure in the reservoir, and thereby tends to raise the diaphragm fromthe position shown in Fig. l. The diaphragm when moved carries with itthe plunger, and the pin secured to the latter acts to rotate theactuating member until the latter in its rotation throws the spring overthe pivotal center of the blade and instantaneously breaks its contactwith the clips. The motor is then stopped, and as the beer or otherbeverage is drawn off the pressure decreases, allowing the spring 8 todepress the plunger. The pin connected to the plunger then moves theactuating member, as indicated by the arrow in Fig. 2, until the springis thrown over the pivotal center of the blade and the latter therebyinstantaneously brought into contact with the clips or electrodes,starting the motor.

What is claimed is 1. In an electric switch: the combination withstationary electrodes, of a movable member pivoted at one end, areciprocating, fluidactuated member, a bell-crank for operating themovable member loosely pivoted, aspring connected at one end with themovable member and at its other end with the bell-crank at a pointbeyond the pivotal center of the movable member, pins on the bell-crank,and a pin carried by the fluid actuated member adapted to contact withthe pins on the bellcrank to move the same.

2. In an electric switch: the combination with stationary electrodes, ofa movable member pivoted at one end, a reciprocating, fluidactuatedmember, a bell-crank for operating the movable member loosely pivotedand having a portion extending to a point beyond the pivotal center ofthe movable member, a spring connected at one end with the movablemember and at its other end with said portion of the bell-crank at apoint beyond the pivotal center of the said movable member, pins on thebell-crank, and a pin carried by the fluid-actuated member adapted tocontact with the said pins on the bell-crank for moving the same.

3. In an electric switch, the combination with stationary electrodes, ofa cylinder, a fluid-actuated plunger reciprocating therein, a shaftmounted at the side of said cylinder, a movable member pivoted to saidshaft and adapted to make and break contact with the electrodes, anactuating member mounted on said shaft, a spring connected at one end tothe movable member and at the other end to the actuating member at apoint beyond the pivotal center of the movable member, and means carriedby the plunger adapted to move the actuating member to throw the springover the pivotal center of the movable memher.

4, In an electric switch, the combination with stationary electrodes, ofa cylinder, a fluid-actuated plunger reciprocating therein, a shaftmounted at the side of the cylinder, a movable member pivoted on theshaft and adapted to make and break contact with the electrodes, abell-crank mounted on said shaft, a spring connected at one end to themovable member and at its other end to the bell-crank at a point beyondthe pivotal center of the movable member, and means carried by theplunger adapted to move the bell-crank to throw the spring over thepivotal center of the movable member at predetermined points in thereciprocation of the plunger.

5. In an electric switch, the combination with stationary electrodes, ofa cylinder, a fluid-actuated plunger reciprocating therein, a shaftmounted at the side of the cylinder, a movable member pivoted on theshaft and adapted to make and break contact with the electrodes, abell-crank mounted on said shaft, a spring connected at one end to themovable member and at the other end to the bellcrank at a point beyondthe pivotal center of themovable member, and a pin carried by theplunger adapted to move the bell-crank at predetermined points in thereciprocation of the plunger to throw the spring over the pivotal centerof the movable member.

6. In an electric switch, the combination with a pair of clips formingstationary electrodes, of a cylinder, a fluid-actuated plungerreciprocating therein, a shaft mounted at the side of the cylinder, ablade pivoted on said shaft and adapted to make and break contact withthe electrodes, a bell-crank mounted on said shaft, a spring connectedat one end to the blade and at the other end to the bellcrank at a pointbeyond the pivotal center of the blade, and a pin carried by the plungeradapted to move the bell-crank at predetermined points in thereciprocation of the plunger to throw the spring over the pivotal centerof the blade.

7. In an electric switch, the combination with stationary electrodes, ofa cylinder, a fluid-actuated plunger reciprocating therein, a shaftmounted at the side of said cylinder, a movable member pivoted on theshaft, a bellcrank mounted on said shaft for operating the movablemember, a spring connected at one end with the movable member and at itsother end with the bell-crank at a point beyond the pivotal center ofthe movable member, a pin on the bell-crank, and a pin carried by theplunger adapted to coact with said pin on the bell-crank to move thelatter.

8. In an electric switch, the combination with a cylinder, of a plungerhaving a collar through which it extends and. with which it is inthreaded engagement, said collar carry- Corrections in Letters PatentNo. 808,065.

ing means for operating the switch, a diaphragm adapted to move theplunger, a spring seated on the collar and adapted to press the plungeragainst the diaphragm, and means for regulating the tension of thespring.

9. In an electric switch, the combination with a cylinder, of a plungeroperating therein and provided with a collar-carrying means adapted tooperate the switch, a diaphragm adapted to move the plunger, a springadapted to press the plunger against the diaphragm, a thumb-screwengaging with an interiorlythreaded portion of the cylinder and adaptedto regulate the tension of the spring, and means adapted to adjust theplunger with relation to the diaphragm.

10. In an electric switch, the combination with a cylinder, of a plungeroperating therein, having a collar-carrying means adapted to operate theswitch, a diaphragm, a spring seated on the collar and adapted to pressthe plunger against the diaphragm, a thumbscrew engaging with aninteriorly-threaded portion of the cylinder and adapted to regulate thetension of the spring, said thumbscrew being provided with a threadedpassage for the stem of the plunger,- and the latter having a threadedportion engaging with the threaded passage in the collar whereby theplunger is adjusted with relation to the diaphragm.

11. In an electric switch, the combination with a cylinder, of aplungercarrying a collar provided with means adapted to operate theswitch and with which the plunger is in threaded engagement, a diaphragmadapted to move the plunger, a spring seated on the collar, athumb-screw in engagement with an interiorly-threaded portion of thecylinder and adapted to regulate the tension of the spring, said plungerextending through the spring and thumb-screw whereby the said plungercan be adjusted with relation to the diaphragm independently of thethumb-screw.

Signed at New York city this 19th day of April, 1905.

SAMUEL H. BECK. Witnesses:

RAYMOND C. SPAULDING, FRED. BEEKEN.

[SEAL] It is hereby certified that in Letters Patent No. 808,065,granted December 26, 1905,

upon the application of Samuel H. Beck, of New York, N. Y., for animprovement in Electric Switches, errors appear in the printedspecification requiring correction, as

follows: On page 3, in lines 8 and 19, the hyphens between the wordscollar and carrying should be stricken out; and that the said LettersPatent should be read with these corrections therein that the same mayconform to the record of the case in the Patent Ofiice.

Signed and sealed this 30th day of January, A. D., 1906.

D F. I. ALLEN,

Commissioner of Patents.

